public function testCreateAndUpdate()
{
$rrdFile = __DIR__ . "/speed.rrd";
$rrd = new Rrd($rrdFile);
$timestamp = new DateTimeImmutable('2016-01-01 13:37:42');
if (file_exists($rrd->getFileName())) {
unlink($rrd->getFileName());
}
if (!file_exists($rrd->getFileName())) {
$creator = new RRDCreator();
$creator->setFileName($rrd->getFileName());
$creator->setStart($timestamp);
$creator->setStep(60);
$dataSource = new RrdDataSource();
$dataSource->setName('downstream');
$dataSource->setType(RrdDataSource::TYPE_COUNTER);
$creator->addDataSource($dataSource);
$dataSource = new RrdDataSource();
$dataSource->setName('upstream');
$dataSource->setType(RrdDataSource::TYPE_COUNTER);
$creator->addDataSource($dataSource);
$archive = new RrdArchive();
$archive->setConsolidation(RrdArchive::CONSOLIDATION_AVERAGE);
$archive->setSteps(60);
$archive->setRows(60 * 24);
$creator->addArchive($archive);
$archive = new RrdArchive();
$archive->setConsolidation(RrdArchive::CONSOLIDATION_AVERAGE);
$archive->setSteps(60 * 60);
$archive->setRows(72);
$creator->addArchive($archive);
$creator->save();
}
$rrd->setDateTime($timestamp->add(new DateInterval('PT1M')));
$rrd->update(['downstream' => 1024, 'upstream' => 768]);
$rrd->setDateTime($timestamp->add(new DateInterval('PT2M')));
$rrd->update(['downstream' => 1024, 'upstream' => 768]);
$this->assertSame('2016-01-01 13:39:42', $rrd->getDateTime()->format('Y-m-d H:i:s'));
$this->assertSame('2016-01-01 13:39:42', $rrd->getLastUpdate()['timestamp']->format('Y-m-d H:i:s'));
}
